Athenahealth ready for tipping point

On the Hot Seat:Jonathan Bush, 42, co-founded Athenahealth in 1997 as a women’s health practice management company. Today, the Watertown company is a fast-growing provider of on-demand billing, practice management, and electronic health record services to about 31,000 hospitals and doctors groups across the United States. Bush spoke to Globe reporter Robert Weisman during a visit to the newspaper.